To play, just navigate your character through the tunnel (by turning your device) and blast objects out of the way. Eventually, you'll reach an "Alien Boss" that's really a math monster - asking a number of math-related questions.

The more correct answers you give, the more points you'll total and the farther you'll go in the game. You can also unlock new weapons, ammo and more levels.

HyberBlast 2 is free to download for Apple devices. It's available for $4.99 through the Amazon app store for Android and also as a Nook app.